Spool for photographic films.



PATENTED AUG. 27, 1907.

J. W. SGHATZ. SPOOL FOR PHOTOG-RAPHIG FILMS.

APPLICATION FILED AUG.24.1906.

Qvll'nem 7M 0% v I UNITED STATES PATENT OFFICE.

JOHN WILLIAM SCI-IATZ, OF GHAPIAQUA, NEW YORK, ASSIGNOR TO HIMSELF ANDHERRMAN A. SCHATZ, OF CHAPPAQUA, NEW YORIC SPOOL FOR PHOTOGRAPHIC' FILM.

Specification of Letters Patent.

Patented Aug. 2?, 1907.

Application filed August 24, 1906. Serial No. 331.920.

To all whom may concern:

Be it known that I, JOHN WILLIAM SCHATZ, of the town of Chappaqua,county of Westchestcr, and State of New York, have inventednew anduseful Improvements in Spools for Photographic Films, ofwhich thefollowing is a full, clear and exact description when taken inconnection. with-the accompanying drawings.

This invention hasfor its object the production of a. sheet metal spoolfor photographic films, and consists of the various improvements andcombinations of parts set forth and claimed hereinafter.

Spools for photographic films have ordinarily been made of a woodendowel with steel flanges on the ends. A spool of this construction isapt to shrink or expand under varying temperatures and affectdisastrously the films wound thereon. Furthermore, in turning a woodenspool inaccuracies are apt to occur as well as in drilling the hole oraxial bore of the spool. These inaccuracies are avoided in the presentinvention. In wooden spools, the shrinkage or contraction of the hub isapt to release the flange so that it may comeg'pff.

In the metal spool described herein, the flanges at the end of the spoolmay be fasthed securely and squarely on the hub or shank, and the'hollowform of the spool insures its lightness. '4

Referring to the drawings, Figure 1 represents a side elevation of aspool embodying the invention, Fig. 2, a ;longitudinal section on line2-2 of Fig. 1, Fig.- 3, a View of the envelop or blank from which thehub of the spool is formed, and Fig. 4, an end view of the spool.

In all figures, similar letters of reference represent like parts.

The parts designated by the letter A represent the hub or shank of thespool which is'formed of the blank or envelop, shown in Fig' 3, rolledlongitudinally. Near the ends of the blank beads B areforined, whichwhen the hub is formed produce annular shoulders C. At its center, thehub is flattened to form a depression D, and across the depressionlengthwise with the hub extends a bridge E, the ends of which F areforced into the, hub and whose outer surface conforms to the arc of thecircumference of the hub of the spool (Figs. 1 and 2). A narrow space oropening G is thus provided between the hub and bridge, which openingforms the slot for-holding the end .of the film or paper outside of thefilm.

H designates the end flanges of the spool, which are rations throughwhich the ends of the hub project until the beads or annular shoulders 0come in contact with the inner side of the flanges and prevent furthermovement. The flanges, as shown more particularly in Fig. 2, aredepressed at their center, as shown at I, so that the shoulders C willfit into the flanges and prevent crimping in the rolling or winding ofthe film.

Thimbles K are adapted to fit into the ends of the hub A and hold theends ofthe hub rigid. The thimbles K are provided with the usualperforations L for One of these perforations is provided with wings M ofwell known form.

Having now described my inventiomwhat I claim and desire to secure byLetters Patent, is

1. In a spool for photographic films, a hub formed of sheet metal rolledlongitudinally, having a longitudinal depression on one side thereof,substantially as described.

2. In a spool for photographic films, the combination with a hub formedof sheet metal rollcdiongitudinelly, having a longitudinal depression onone side thereof; of a bridge projecting longitudinally with said hubover said depression, whereby a narrow opening is formed between saidbridge and hub, substantially as described.

3,.In a spool for photographic films, the combination ,with a hub formedof sheet metal rolled longitudinally, and having a longitudinaldepression; of a bridge p'rojecting over said depression and having itsouter surface conform to the arc of the circumference of said hub,substantially as described.

4. In a spool for photographic films, the combination with a hub formedof sheet metal rolled longitudinally; of flanges mounted on the ends ofsaid hub; and thirnbles projecting into the ends of said hub,substantially as described.

5. in a spooltor photographic films, the combination with a. hub formedof sheet metal rolled longitudinally having annular shoulders or beadsnear the ends; of flanges mounted on the ends of said hub having acentral depression to take over-said beads or shoulders, substantiullyas described.

21st day of August, 1906.

JOHN \VILLIAM SCHATZ.

Witnesses H. A. SCHATZ, '1. H. WARNER.

formed separately from the hub, with circular perfoapplication for usein placing the spool in the camera.

6. in a spool for photographic films, the combination

